Midnight 3D IMAX tickets purchased today. This will be Cap'n Mac's first midnight premier ever! There were only like 6 other pairs of tickets already selected in our theatre, so we got really great seats too!
Other bold prediction: Rey turns heel. Finn has to step up and be the hero.
I actually had the opposite thought where Kylo does the face turn by betraying Snoke during an ambush attack backstage. It sticks with the idea of copying all the themes from the original series to boot.
I think that is likely, as well. Rey turning to me would be the most dramatic/terrible (for the audience, not the film) turn that could happen in the second act of this trilogy. Her being set up as basically perfect in the first movie means, to me, they have to do something more interesting with the character here. She's clearly the most powerful of the three main characters.
Seems to me the trailer wants us to think that Luke will be too scared to train Rey after seeing how powerful she really is, so she leaves and tries to take on Kylo and Snoke on her own, eventually losing/being captured and then persuaded to join them, leaving a setup for Luke to come out of hiding to take them both down in Episode 9....
... but as Luke says in the trailer.. "this is not going to go how you think"